Recurrent meningitis and transethmoidal intranasal meningoencephalocele.

A three-year-old girl with hypertelorism suffered seven episodes of meningitis. X-ray, CT scan and gamma-cisternography revealed a meningoencephalocele at the base of the skull. At operation, a 'hole' of about 25mm was clearly visible in the midline, just behind the lamina cribrosa; through this a piece of brain tissue protruded towards the nasal cavities. The herniated brain-tissue was removed and the gap was closed. Meningitis did not recur.